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Ivahew [28]
3 years ago
11

Solve for x and y 5x + 3y=35, 2x+4y=28​

Mathematics
2 answers:
Tatiana [17]3 years ago
5 0
The answer would be:

y = 5

x = 4
lina2011 [118]3 years ago
4 0

Answer:

Step-by-step explanation:

Let's solve your system by substitution.

5x+3y=35;2x+4y=28

Step: Solve 5x+3y=35 for x:

5x+3y=35

5x+3y+−3y=35+−3y(Add -3y to both sides)

5x=−3y+35

5x/ 5 = −3y+35/ 5  (Divide both sides by 5)

Step: Substitute  −3/ 5 y+7 for x in 2x+4y=28:

2x+4y=28

2( −3/ 5 y+7)+4y=28

14/ 5 y+14=28   (Simplify both sides of the equation)

14/ 5 y+14+−14=28+−14   (Add -14 to both sides)

14/ 5 y=14

14/ 5 y/ 14/ 5 = 14/ 14/ 5

(Divide both sides by 14/5)

y=5

Step: Substitute 5 for y in x= −3/ 5 y+7:

x= −3/ 5 y+7

x= −3/ 5 (5)+7

x=4  (Simplify both sides of the equation)

Answer:

x=4 and y=5

 

 

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Chuck and Dana agree to meet in Chicago for the weekend. Chuck travels 252 miles in the same time that Dana travels 228 miles. I
vlada-n [284]

Answer:

Chuck's rate of travel = 63mph

Step-by-step explanation:

Given chuck travels 252 miles and dana travels 228 miles. Given that they both take same time to travel .

Let the travelling time be T.

Also given that the speed of chuck is 6mph greater than that of dana's.

let the speed of chuck be x. Now

Speed = \frac{distance }{time}

x= \frac{252}{T}

Now for Dana's speed

x-6= \frac{228}{T}

When we divide both the equations we get

\frac{x}{x-6}=\frac{252}{228}

\frac{x}{x-6}=\frac{63}{57}

x=63mph

7 0
3 years ago
Read 2 more answers
How do you Simplify the expression completely.<br><br> c(4b3+3a)+b(2cb2−6ac) <br> Click
Dafna1 [17]

Answer:

c×3 (2 b^3 - 2 a b + a)

Step-by-step explanation:

Simplify the following:

c (4 b^3 + 3 a) + b (2 c b^2 - 6 a c)

Hint: | Factor common terms out of 2 c b^2 - 6 a c.

Factor 2 c out of 2 c b^2 - 6 a c:

c (4 b^3 + 3 a) + b×2 c (b^2 - 3 a)

Hint: | Pull a common factor out of c (4 b^3 + 3 a) + b×2 c (b^2 - 3 a).

Factor c out of c (4 b^3 + 3 a) + b×2 c (b^2 - 3 a), resulting in c ((4 b^3 + 3 a) + b×2 (b^2 - 3 a)):

c (4 b^3 + 3 a + 2 b (b^2 - 3 a))

Hint: | Distribute 2 b over b^2 - 3 a.

2 b (b^2 - 3 a) = 2 b^3 - 6 a b:

c (4 b^3 + 3 a + 2 b^3 - 6 a b)

Hint: | Group like terms in 4 b^3 + 3 a - 6 a b + 2 b^3.

Grouping like terms, 4 b^3 + 3 a - 6 a b + 2 b^3 = (4 b^3 + 2 b^3) - 6 a b + 3 a:

c (4 b^3 + 2 b^3) - 6 a b + 3 a

Hint: | Add like terms in 4 b^3 + 2 b^3.

4 b^3 + 2 b^3 = 6 b^3:

c (6 b^3 - 6 a b + 3 a)

Hint: | Factor out the greatest common divisor of the coefficients of 6 b^3 - 6 a b + 3 a.

Factor 3 out of 6 b^3 - 6 a b + 3 a:

Answer: c×3 (2 b^3 - 2 a b + a)

7 0
3 years ago
What is 9/16 divided by 3/8 Please help.
ozzi

Answer: 3/2

Step-by-step explanation:

<u>Concept:</u>

When doing division "[a]÷[b]", [a] is the dividend, [b] is the divisor.

<u>Solve:</u>

(9/16) / (3/8) ⇔ <em>Given</em>

(9/16) × (8/3) ⇔ <em>Convert division into multiplication by using the reciprocal </em>

<em>                           of the divisor</em>

(9×8) / (16×3) ⇔ <em>Numerator multiply each other/ Denominator multiply each </em>

<em>                           other</em>

<em />

72 / 48 ⇔<em> Multiplication</em>

(3×24) / (2×24) ⇔ <em>Factorize</em>

3 / 2 ⇔ <em>Simplify</em>

Hope this helps!! :)

Please let me know if you have any questions

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3 years ago
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Anastasy [175]

Answer:

1/2

Step-by-step explanation:

1/2 times 1/2 equals .25 (.25 is 1/4 which is half of 1/2)

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alexira [117]

Answer:

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I think that the answer

7 0
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